I feed primary dubia and crickets with the occasional earthworm for a treat. Dust the crickets and roaches with vitamins. Not sure about earthworms, I’ve never dusted them. I feed with tongs one at a time to insure everyone gets eaten and nothing escapes and hides in the enclosure. I feed 3 times per week, and as much as the frogs will eat. I might be over feeding but I like my frogs fat and happy.